I don’t know what stack means. Looking at the code, it seems to be similar to adding an array. What's the difference?
array_push() Push one or more units to the end of the array (push)
array_pop() Pop the last unit of the array (pop)
//m.sbmmt.com/php-weizijiaocheng-364112.html
This article is very detailed, you can read it
![[Web front-end] Node.js quick start](https://img.php.cn/upload/course/000/000/067/662b5d34ba7c0227.png)
array_push() Push one or more units to the end of the array (push)
array_pop() Pop the last unit of the array (pop)
//m.sbmmt.com/php-weizijiaocheng-364112.html
This article is very detailed, you can read it